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The fuse rating is expressed in terms of

VAR
voltage
kVA
current

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A three phase circuit breaker is rated at 2000 MVA, 33 kv. The symmetrical breaking current is

20 kA
60 kA
80 kA
35 kA

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The time of closing the cycle, in modern circuit breakers is

0.003 sec
0.01 sec
0.001 sec
0.10 sec

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The fuse wire, in D.C. circuits, is inserted in

Both of the listed here
positive circuit only
negative circuit only
none of the listed here

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A fuse is a

None of these
current controlling device
protective device
current limiting device

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The reflection co-efficient at the open circuited end of a transmission line

None of these
infinity
unity
zero

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